Quick Barcode Scanner and QR code Scanner with Retry Option in Android Kotlin.

Nowadays we need to scan many barcodes and QR codes for scanning purposes, we need a barcode scanner or QR code scanner so today we will learn how to create a barcode and QR code scanner in Android Kotlin.

First of all, we need to add a barcode scanner dependency in the build.Gradle(:app) file

//barcode
implementation 'com.google.android.gms:play-services-vision:20.1.3'

In this project, I am using view binding so we need to add a build feature in the build.Gradle(: app) file.

android {
buildFeatures {
        viewBinding = true
    }
}

Now we need to add camera permission in the manifest file. We will add a user feature in the manifest file for accessing the camera hardware.

<uses-permission android:name="android.permission.CAMERA" />
<uses-feature
    android:name="android.hardware.camera"
    android:required="true" />

Let’s start with the scanner design.

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">

    <TextView…